﻿ /**
  * MOTOR 2 - RAPID FLASH DYNAMICS
  * Copyright (c) 2006-2008 Michael Baczynski http://www.polygonal.de
  *
  * This software is provided 'as-is', without any express or implied
  * warranty.  In no event will the authors be held liable for any damages
  * arising from the use of this software.
  * 
  * Permission is granted to anyone to use this software for any purpose,
  * including commercial applications, and to alter it and redistribute it
  * freely, subject to the following restrictions:
  * 
  * 1. The origin of this software must not be misrepresented; you must not
  * claim that you wrote the original software. If you use this software
  * in a product, an acknowledgment in the product documentation would be
  * appreciated but is not required.
  * 2. Altered source versions must be plainly marked as such, and must not be
  * misrepresented as being the original software.
  * 3. This notice may not be removed or altered from any source distribution.
  */
package de.polygonal.motor2.dynamics.contact.generator
{
	import de.polygonal.motor2.collision.pairwise.CollideCircle;
	import de.polygonal.motor2.collision.pairwise.Collider;
	import de.polygonal.motor2.collision.shapes.ShapeSkeleton;
	import de.polygonal.motor2.dynamics.contact.Contact;
	import de.polygonal.motor2.dynamics.contact.Manifold;	

	public class CircleContact extends Contact
	{	
		public var manifold:Manifold;
		 
		public static function create(shape1:ShapeSkeleton, shape2:ShapeSkeleton):Contact
		{
			return new CircleContact(shape1, shape2);
		}
		
		public function CircleContact(shape1:ShapeSkeleton, shape2:ShapeSkeleton)
		{
			super(shape1, shape2);
			
			_collider = new CollideCircle();
			
			manifold = manifolds[0] = new Manifold();
			manifold.c0.Pn = 0;
			manifold.c0.Pt = 0;
		}
		
		override public function evaluate():void
		{
			_collider.collide(manifold, shape1, shape2, null);
			manifoldCount = manifold.pointCount > 0 ? 1 : 0; 
		}
		
		//TODO remove destory
		public static function destroy():void	
		{
		}
		
		override public function getConstructor():Class
		{
			return CircleContact;
		}
	}
}